Dish washer with automatic jet operation



July 1, 1958 c, BROWN, JR 2,840,838

DISH WASHER WITH AUTOMATIC JET OPERATION Filed Aug. 24, 1953 2Sheets-Sheet 1 1 rrrl AT TORNEY5 y 1, 1958 k. BROWN, JR 2,840,838

DISH WASHER WITH AUTOMATIC JET OPERATION Filed Aug. 24. 1953 2sheets-sheetz H INVENTOR.

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ATTORNEYS United States Patent DISH WASHER WITH AUTOMATIC JET DPERATIONCharles Kepler Brown, .ln, Verona, N. 3'.

Application August 24, 1953, Serial No. 376,128

19 Claims. (Cl. 15-44) which are covered with material that will notcome off a readily in the washer.

It is an object of this invention to provide a small dishwasher in whicheach dish is separately washed. The manipulation of the successivedishes is done so quickly that all the dishes for a moderate sizedfamily can be washed with this invention in less time than is requiredfor setting up and going through the washing cycle of the larger andmore expensive automatic dishwashers.

One feature of the invention relates to apparatus by which a soapsolution is first sprayed on the dish automatically as the dish isbrought into position to be scrubbed by rotating brushes; Anotherfeature of the invention related to automatic rinsing of the dish as 'itmoves away from the brushes that do the scrubbing.

The invention is preferably constructed in such a way that it operatesequally Well for washing plates, glasses, tumblers and pots and pans.

Other objects, features and advantages of the invention will appear orbe pointed out as the description proceeds.

In the drawing, forming a part hereof, in which like referencecharacters indicate corresponding parts in all the views:

Figure 1 is a vertical sectional view through a dishwashing machine madein accordance with this invention;

Figure 2 is a top plan view, on a reduced scale, of the dishwashingmachine showing Figure 1;

Figure 3 is a greatly enlarged, sectional view taken on the line 3-3 ofFigure 1; and

Figure 4 is a greatly enlarged sectional view taken on the line 4--4 ofFigure 1.

The dishwashing machine includes a base 10 having a cylindrical metalsidewall 11 over which a flexible rubber shell 12 is placed. The rubbershell decreases somewhat in diameter toward its upper edge 13 so thatthe inside surface of the rubber shell, near the upper edge, deflectsjets of water downwardly to eliminate splashing. In the constructionillustrated there are some conduits or passages 15 extending upwardlywithin the rubber shell 12 at angularly spaced regions around thecircumference of the rubber shell. These conduits or passages 15 lead tonozzles 17 which direct water sprays inwardiy toward the vertical axisof the dishwashing machine, and at an angle downwardly.

The base 10 has a bottom 20, and has an inner wall 21 spaced from thewall 11 to provide an annular ice channel 22 for used water. Thisannular channel drains through an outlet 24.

There is a cover 26 secured to the upper edge of the inner wall 21. Thiscover 26, together with the sidewall 21 and the portion of the bottom20, within the sidewall 21, provide a reservoir for soap solution.

The washing machine has a turntable 30 supported by a bearing on acentral hub assembly 32 located at the center of the machine. Theturntable 30 has an inside surface 34, which is preferably provided withgear teeth that mesh with a driving gear 35 extending upwardly from apulley wheel 36.. The gear 35 and the pulley wheel 36 rotate about astud shaft 37 secured at its lower end to the cover 26 of the reservoir.

The pulley 36 is driven from a smaller pulley 40 through a belt 41. Thesmaller pulley 40 is connected to the upper end of an armature shaft 43of an electric motor 44 enclosed in a housing 45 which is located in thesoap reservoir. The housing 45 completely seals the motor 44 from anycontact with the liquid contents of the reservoir. The pulleys 36 and40, connected by the belt 41, are merely representative of a speedreducer between the motor 44 and the turntable 30.

In the preferred construction, the turntable 30 is preferably a pressedmetal stamping with a downwardly extending skirt 47 which overlaps theupper end of the sidewall 21 so as to protect the pulleys 36 and 40, andthe belt 41, from having water splashed on them from the sidewalls ofthe rubber shell 12.

In order to add weight to the turntable 30, and thus obtain a flywheeleffect, a ring 50 is attached to the turntable 30 around the peripheryof the turntable and outside of the turntable wall which is shaped toprovide the gear teeth. The use of a turntable which is heavy enough tohave some flywheel effect, makes it practical to use a smaller motor ofless power. The turntable 30 runs freely, under no load, most of thetime. This permits the motor 44 to accelerateuntil it is rotating at thefull speed for which it is designed. If the load on the turntable slowsit down, when a dish is held in position for scrubbing, the slowing downis made gradual by the flywheel effect of the turntable, and thedeceleration is not substantial during the short period that eachsuccessive dish is held in contact with the brushes which are carried bythe turntable.

The construction shown is equipped with a brush 53 consisting of abacking element having an outer frame 54 and an inner frame 55. Theouter frame 54 has a section similar to an inverted U, and it hasbristles 56 extending from the frame 54 inwardly, upwardly andoutwardly, as illustrated.

The inner frame 55 has bristles 56 which extend outwardly and upwardly.The bristles from the inner frame 55 extend in directions which are 90degrees removed from the direction in which the bristles of the frame 54extend, as best shown in Figure 2. For clearer illustration in Figure 1,however, the bristles of the frame .55 are shown as though rotated 90degrees from their actual positions.

The inner frame 55 has grooves 60 in its inner face near the lower endof the frame; these grooves 60 fit over complementary splines 61 on anupstanding center hub of the turntable 30. Thus the brush frames 54 and55 rotate as a unit with the turntable 30, but they can be lifted out ofthe washing machine by merely sliding them upwardly along their splinelined connections with the turntable hub. Although the frames 54 and 55are shown constructed in one piece, it will be understood that they canbe separate, with each one extending around only a portion of theperiphery of the turntable hub, or with any other suitable provision fordriving both of the brush frames simultaneously and as a unit with theturntable.

The hub assembly 32 extends through an opening 63 in thev cover 26, andserves to close that opening. The portion of the hub assembly, thatprovides a bearing for the turntable hub, is secured to the cover 26 at64. The center portion of the hub assembly, however, extends downwardlyand fits into a recess 65 in the bottom 20 of the base. The centerportion of the hub assembly 32 can be lifted out of the machine whennecessary for cleaning, as will be explained in connection with Fig. 4,but it is securely held in position by gravity during the operation ofthe machine.

A supporting tube 66 extends through. the upper end of the hub assembly32 and this supporting tube 66 telescopes into the hub assembly 32.There is a spring 68 in the tube 66. for normally holding the tube inthe raised position shown. in full lines in Figure l. A. spray head 70fits into the upper end of thesupporting tube 66. The spray head 70 ispreferably made of rubber or other soft material for contact. with aplate 72 or any other object which is to be washed by the machine. Thereare small protuberances 73 projecting upwardly from the top face of thespray head 70 for the purpose of holding the plate 72 spaced by a slightdistance from the top face of the spray head 70.

The top surface of the spray head 70 is made with sufficient radialextent so that a person using the dishwasher Will be conscious of thecontact of the plate 72 with the different protuberances '73. The objectis to hold the plate 72 so that its surface is substantially parallel tothe top surface of the spray head 70. If the area of the spray head istoo small, it is difficult to tell whether the plate is in contact withthe spray head around all sides of its longitudinal axis. When the plateis held parallel to the top surface of the spray head, the distributionof water across.

the surface of the plate is more uniform when water is supplied throughthe spray head.

A conduit or passage 75 extends along the longitudinal axis of the sprayhead 70. When the tube 66 is pressed downwardly for a predetermineddistance into the hub assembly 32, water from the supporting tube 66flows through the conduit or passage 75 and into contact with thesurface of the plate 72. This water, under substantial pressure, flowsradially outward in all directions across the top of the spray head 70and is projected as radial jets or a circular curtain of water acrossthe surface of the plate.

The water for washing the plate 72 .is not supplied to the spray headuntil the supporting tube 66 has been pushed downwardly below the topedge of the rubber shell 12. Thus the radially projected water strikesagainst the inside surface of the wall of the rubber shell 12 and isdeflected downwardly to prevent any splashing of water over the top edge13.

The internal construction of the hub assembly 32 will be described inconnection with Figure 4. For the preseat, it is sufiicient tounderstand that the supporting tube 66 is normally held in the raisedposition shown in Figure l, and that it can be pushed down into the hubassembly to bring the plate 72 into contact with the brush 53. In theoperation of the machine, plates 72 are successively placed on the sprayhead 70 and pushed downwardly until the supporting tube reaches thelocation at which Water is projected across the downturnedface of theplate. This initial spraying of water is done with a solution of soap.

Continued downward movement of the plate 72 brings it into contact withthe brush 53 which rotates and scrubs the face of the plate.

,The length of time that the plate is held against the brush 53 willdepend upon how dirty the particular plate might be and is a question ofjudgment on the part of the person using the dishwasher. From one tothree seconds is usually sufiicient scrubbing time. When the pressureholding the plate down is released, the spring 68 pushes the supportingtube 66, and plate 72, upwardly into their original position.

During the upward movement of the plate 72,-away from the brush 53,clear rinsing water is sprayed across the surface of the plate. Beforethe plate reaches the level of the top edge 13, the rinsing water isautomatically cut off. When the plate 72 has been lifted out of theshell 12, by completion of the upward movement of the supporting tube66, the person using the washer moves the plate to a drying rack andplaces the next plate on the spray head 70. It is not necessary for theperson using the dishwasher to have any contact with the water. No wateris being sprayed when the plate is first placed on the spray head 70,and the plate can be pressed downwardly into contact with the brush 53by merely pressing one hand against the top surface of the plate.

Ordinarily, it is not necessary to wash the bottom faces of the plates.If. they need washing because of food picked up by stacking of theplates, the bottom surface can be washed by placing it on the spray head70 in the same way as the down-turned top surface already described. Asan added refinement for the dishwasher where it is not objectionable tohave the Water come in contact with the hand of the person using themachine, the nozzles 17 are, provided. These nozzles 17 are l0- cated inposition to project water against the upper surface of the plate whilethe down-turned top surface of the plate is in contact with the brush53. The nozzles 17 are to be considered. optional, therefore, and themachine can be constructed so that no water is projected from thenozzles unless the operator of the machine gives the plate a finaldownward push after it is in contact with the brush 53.

Water is supplied to the dishwashing machine through an inlet connection78, and the passages 15 are supplied with water through pipes 79 whichconnect the passages 15 with the hub assembly 32..

Figure 4 shows the construction of the hub assembly 32. It includes asoap solution pump 80 at the lower end of a cylinder 81. The pump has apiston 82 and a cylinder head 83. The cylinder head 83 is the bottom ofthe hub assembly 32 and fits into the recess 64. One or more channels85, in the bottom face of the cylinder head 83, provides for the flow ofsoap solution from the soap solution reservoir to an inlet passage 88which opens through the cylinder head 83 into the cylinder 81. A ballcheck valve 89 prevents return flow of soap solution through the passage88. The piston 82 is preferably packed by providing an O-ring 91 in apiston ring groove. The piston 82 is urged upwardly by a spring 92compressed between the piston 82 and the cylinder head 83.

There is a passage 94 through the face of the piston 82, and thispassage 94 has a ball check valve 95 at its upper end. As the piston 82moves downwardly in the cylinder 81, the liquid contents of thecylinder, below the piston, are forced upwardly through the passage 94into a tube 97. This tube has prongs 99 around its lower end so that itcannot be closed by the check valve 95. The tube 97 is connected to thepiston 82 by a bushing 101. Above the bushing 101, the piston 82 ishollow to provide clearance for receiving the lower end of thesupporting tube 66 when that tube is telescoped into the hub assembly32. There is a packing washer 103 on top of the bushing 101 for contactwith the lower end face of the tube 66.

The cylinder 81 extends upwardly for a substantial distance and it hasports 105, 106 and 107 at different levels. At the upper end of thecylinder 81 there is a cylinder head 110 with a center sleeve 111 whichserves as a bearing in which the tube 66 slides. The cylinder head 110has packing 112 around the tube 66, and this packing is preferably anO-ring. The lower end of the spring 68 rests against a flange 115 at thetube 97.

The lower end of the sleeve 111 is secured to a partition 113 located ata fixed position in the cylinder 81. Immediately above the partition118, there are elongated ports 129 through the sleeve 112. These ports120 permit water to enter ports 121 in the tube 66 when the tube 66 ispushed down far enough to bring its ports 121 to the level of the ports120.

The cylinder 81 fits into a fixed center hub 125 which is attached tothe cover 26 and which is, therefore, a fixed part of the machine. Thereis packing, preferably O-rings 127, at the upper and lower ends of thehub 125 for preventing escape of water from the hub along the outsidesurface of the cylinder 81. Within the hub 125, there are annularrecesses 130 and 131 at the levels of the cylinder ports 105 and 106,respectively. There is a passage 133 through the wall of the hub 125 incommunication with the water inlet connection 78. The annular recess 133is connected by a passage 135 to an upper water chamber 136 in the hub125. This upper water chamber 136 in the hub 125 extends along thecylinder 81 to the level of the ports 107.

Figure 4 shows the parts in the positions which they occupy when thesupporting tube 66 is at its upper limit of movement. When the tube 66is pushed downwardly by a plate on the spray head at the top of thetube, the lower end of the tube 66 moves downwardly until it comes incontact with the washer 103 in the piston 82. Further downward movementof the tube 66 pushes the piston 82 downwardly and forces soap solutioninto the tube 97.

Soon after the piston 82 begins to move, the port 121 in the tube 66reaches the upper end of the port 120 and water flows from the upperwater chamber 136, through ports 107 into the upper end of the cylinder81, and then through the ports 120 and 121 into the tube 66. Duringcontinued downward movement of the tube 66 and the piston 82, soapsolution from below the piston 82 is injected into the stream of waterflowing from the ports 120 and 121 upwardly through the tube 66. Thus asoapy water is supplied to the spray head at the upper end of the tube66 while the tube is being pushed downwardly.

When the plate has been brought into contact with the scrubbing brushes,and further downward movement of the tube 66 has stopped, there is nofurther supply of soap solution to the water stream; but the soapalready on the plate is used by the brushes for scouring the surface ofthe plate. The continued flow of water from the ports 120 and 121,upward through the tube 66, dilutes the soap solution and carries awaythe material which is scrubbed from the plate by the brushes. During thetime that the plate is in contact with the brushes, the port 121 islocated near the lower ends of the elongated ports 120 in the sleeve111.

As the piston 82 moves downwardly, it uncovers the cylinder ports 106,but this supplies no water to the passages 79 because there is no supplyof water to the space above the piston 82 until it has moved down wardlyto the level of the ports 105. When these ports are uncovered, waterflows from the inlet connection 78 through the ports 105, through thespace in the cylinder 81 above the piston 82, and out through the ports106 to the passages 7? which supply the nozzles at the top of thedishwasher shell.

It will be apparent that the supply of water to the passages 79 can beprevented by not pushing the tube 66 down far enough to cause the piston82 to uncover the ports 105. In the preferred construction, the plate onthe spray head comes into contact with the scrubbing brushes before thepiston 82 uncovers the ports 105. The dishwashing machine can beoperated, therefore, without ever supplying water to the passages 79;but if top of the it is desired to use the nozzles which the passages 79supply, a final downward movement is imparted to the tube 66 and thebristles of the brushes have ample flexibility to permit thecorresponding downward movement of the plate.

When pressure on the plate is released and the tube 66 moves upwardlyagain under the influence of the spring 68, clear water is supplied tothe tube 66 as long as the ports 121 are travelling along the .ports120. When the tube ports 121 pass beyond the upper end of elongatedports 120, the supply of rinsing water to the tube 66 is shut 01f.

During the upward movement of the tube 66, the spring 92 returns thepiston 32 to its raised position, and this movement of the piston 32draws a fresh supply of soap solution from the reservoir through thepassage 88 and past the check valve 82. When the tube 66 and piston 82have reached the upper limit of travel, the machine is prepared to washthe next plate. The movement of the parts is rapid and successive platescan be washed every three to five seconds.

Referring again to Figure 1, when glasses or tumblers are to be washed,they are placed in contact with the supporting head in the same way as aplate and they are pushed downwardly over the portion of the brushsupported by the inner frame 55. The bristles supported from the innerframe scrub the inside surface of the glass, and the bristles supportedby the outer frame 54 scrub the outside surface of the glass.

For washing pots and pans, the bristles 56 of the outer frame 54-areshaped, as illustrated, to fit into the pot or pan, and it is a featureof the invention that the outwardly extending bristles from the frame 54are of substantial length so that they can be distorted to take theshape of pets and pans of widely different size and contour. The watersprayed across the inside surface of the down-turned bottom of a glass,pot or pan, runs down the sides and provides first the soapy solutionand then the rinsing water for cooperation with the outwardly extendingbristles from the brush frame The preferred embodiment of the inventionhas been illustrated and described. Terms of orientation are, of course,relative. For example, the axis of rotation of the turntable, and thelongitudinal axis of the supporting tube that carries the spray head,may horizontal; and the dish may be held against the spray head byhorizontal pressure. Other changes and modifications can be made andsome features can be used in different combinations without departingfrom the invention as defined in the claims.

I claim as my invention:

1. A dishwasher comprising a container having a top edge, a supportextending upwardly from the container and having a top surface on whicha dish or other article is placed, a water discharge conduit openingthrough said top surface and into depressed areas of the top surfacewhich are spaced from the confronting surface of the dish or otherarticle on the support, the depressed areas extending radially to theedge of the support whereby water from said discharge conduit isdeflected by the dish or other article and is discharged radiallyoutwardly across the surface of the dish or other article, bearing meansin which the support is movable up and down, resilient means holding thesupport in a raised position, moving brush means with which the articlecontacts when the support is pushed downwardly, said brush means havingbristles at its upper end and having all of said bristles terminating ata level lower than the top edge of the container, and valve means inposition to be operated by the support for supplying water to the waterdischarge conduit when the surface of the article which rests on thesupporting means moves downwardly to a level below the top edge of thecontainer, the supporting means being long enough to operate the valvemeans before the surface of the article comes into contact with thebrush 111631 5,

2. A dishwasher including a support having a top surface of limited areaon which a plate orother article is balanced with a midportion of thearea of the plate in contact with said support, bearing means inwhichthe support is movable upwarly and downwardly; moving brushes forscri.ibbing the surface of the plate when the support is pusheddownwardly to bring the plate in contact with the brushes, a waterdischarg conduit comprising a unitary structure with the support andmovabl'e upwardly and downwardly with the support and having its outletend adjacent to the top of the support and in position to direct wateragainst the plate or other article at a location that moves downwardlyas the article and support move downwardly, valve means for controllingthe supply of water to the discharge conduit, the valve means being inposition to be operated by the support when the support is pusheddownwardly below a predetermined level, the supporting means being longenough to operate the valve means before'the' top sur' face of thesupport reaches the level of the brush means.

3. A dishwasher including a support having a top surface on which aplate or other article is held with the surface to be washed in contactwith protuberances on the support, bearing means on which the support ismovable upwardly and downwardly, movable brush means with which theplate comes into contact when the support is moved downwardly below apredetermined level, said brush means having bristles at its upper endand having all of said bristles terminating at a level lower than thetop edge of the container, a container for soap solution, the supporthaving an opening therethrough in a surface of the support lower thanthe tops of the protuberances and opposite the surface of the plate thatcontacts with the protuberances whereby water discharged through saidopening is deflected by the plate and discharged between saidprotuberances and radially across the under surface of the plate, valvemeans operated by the support to supply water to the opening in thesurface of the support when the support is moved downwardly to apredetermined level, and means for supplying soap to the under surfaceof the plate including a soap dispenser and means by which the soapdispenser is operated in response to downward movement of the support.

4. A dishwasher including a support having a top surface on which aplate or other article is held with the surface to be washed in contactwith protuberances on the support, bearing means on which the support ismovable upwardly and downwardly, rotary brush means with which the platecomes into contact when the support is moved downwardly below apredetermined level, a container for soap solution, means for sprayingwater against the under surface of the plate, valve means operated bythe support to supply water to the spraying means when the support ismoved downward to a predetermined level, a soap dispenser nicluding areciprocating supply pump which is moved by said support during thedownward movement of the support to eject soap solution into a stream ofwater flowing to the spray means, and a spring that operates the soappump at its return stroke during upward movement of said support.

5. A dishwasher including a support which comprises a verticallyextending tube with a flange at the upper end of the tube on which aplate or other article is held with the center portion of the plate incontact with the flange, part of the face of the flange being at a lowerlevel than other parts and confronting the surface of the plate butspaced therefrom, a water discharge conduit opening through that part ofthe face of the flange which is spaced from the plate, and the face ofthe flange having areas spaced from the plate and extending radiallyfrom the part of the face through which the water discharge conduitopens whereby water from said discharge conduit is deflected by theplate and is dischargedv radially outwardly across the surface of theplate, bea1:

estates 8 ing means in which the tube is movable axially, a hub assemblyin which the bearing means are contained and into which thetubetelescopes when it moves axially and downwardly, valve means operated bythe support and controlling the flow of water to the discharge conduit,the valve means being in position to be opened when the support isdepressed below a predetermined level, a-soap solution dispenser forsupplying soap solution to the discharge surface in the support, saidsoap solution dispenser: being operated or controlledby movement of thesupport and located in position to be actuated by the support during atleast apart of the downward movement of the support;

6.. A dishwasher including. a vertically. extending tube having asptiayhead. at its. upper end, the sprayhead having, a. top surface witha: group of. low protuberances by which. a downturned; surface. of a.plate is supported with clearance passages bounded. by the. plate,.theprotuberances, and they ,topsurface; of the, sprayhead, bearing meansin; which the tube is movable axially, a hub assembly into which. thetube telescopes, a conduit for spraying water against the downturnedsurface of the plate inward ofv said protuberances for discharge throughsaid clearance. passages and radially across the downturned surface ofthe plate, and. other conduits for spraying water against. the upturnedisurface of the plate, valve means for. controlling the supply of. waterto the conduits, said valve. means. being in position to. be operated bya predetermined downward movement for supplying water to the conduitsfor the downturned surface of theplate,

and by a greater predetermined downward movement for supplying water tothe conduits for the upturned surface of the plate.

7. A dishwasher including a vertically extending tube having a topsurface with a group of protuberances by which a downturned surface of aplate is supported, said top surface having an opening therethroughcommunicating with said tube, and radially directed outlets through thespaces between the protuberances when a dish is against theprotuberances, the support being vertically movable and having resilientmeans urging it into a raised position, a hub assembly into which atleast a portion of the tube telescopes when moved downwardly, valvemeans operated by the support to supply Water. to the support forspraying against the downturned surface of the plate, said valve meansbeing in position to be operated by downward movement of'the tube beyonda predetermined level.

8; The dishwasher described in claim 7 characterized by a constructioninwhich the water is sprayed against the downturned surface of the plateby a sprayhead located at the topof the support tube with a stern of thesprayhead extending downwardly into the tube, and further characterizedby a compression spring which constitutes the resilient means for urgingthe support into a raised position.

9. A dishwasher including a container which is opened at the top andwhich hasside walls with upper portions that converge to-provide an'inward slope for the sidewalls for directing impingingwater spraysdownwardly into the container, a support comprising a verticallyextending tube with bearing means in which the tube is movable upwardlyand downward1y, a spring that holds the tube in a raised position withthe upper end of the tube extending above the level of the side wall ofthe container, a sprayhead at the top of the tube with a top surfacehaving a group of upwardly extending protuberances for supporting thedownturned. surface of a plate Whichis to bewashed and; betweenwhichwater is sprayed radially across the plate on the protuberances,passages through which water is supplied to: the sprayhead, and valvemeans commanding the passages, said valve means being in position-to beoperated by downward movement of the tubebelow a predetermined level.

10. A dishwasher including-a container which is open at the top andwhich has side walls with upper portions that converge to provide aninward slope for the side walls for directing impinging; water spraysdownwardly into the container, the said wall'being of compositeconstruction with the lower portion of the side wall permanentlyconnected with the bottom of the container, and the upper portion of theside wall comprising a shell which is detachably connected to the lowerportion of the container by a telescoping slip joint, a supportcomprising a vertically extending tube with bearing means in which thetube is movable upwardly and downwardly, a spring that holds the tube ina raised position with the upper end of the tube extending above thelevel of the side wall of the container, a sprayhead at the top of thetube with a top surface having a group of upwardly extendingprotuberances for supporting the downturned surface of a plate which isto be washed, a passage through which water is supplied to thesprayhead, and valve means commanding the passage, said valve meansbeing in position to be operated by downward movement of the tube belowa predetermined level.

11. The dishwasher described in claim 9 characterized by a plurality ofnozzles located around the side wall of the container and directedinwardly and downwardly in position to supply jets of water against theupper surface of a plate which is resting on the support while thesupport is near its downward limit of movement, and furthercharacterized by valve means operated by [the downward movement of thesupport for supplying water to the nozzles when the support is moveddownwardly below a predetermined level.

12. A dishwasher including a support on which a plate is placedpreparatory to washing, a water discharge conduit opening through anarea of the top of the sup port that is spaced from the surface of theplate on said support, the spaced area having portions extendingradially whereby water from said conduit is deflected by the plate anddischarged across the spaced area and adjacent to the top of the supportfor spraying water radially across the downturned surface of the plate,the support being movable upwardly and downwardly with the platethereon, nozzles located at angularly spaced regions around the supportand radially outward therefrom in position to direct jets of wateragainst the top surface of the plate when the plate and support are in alowered position, passages through which water is supplied to thesprayhead and to the nozzles, and valve means commanding said passagesand operated by downward movement of the support to supply water to thesprayhead and to the nozzles.

13. A dishwasher including a support on which plate is placedpreparatory to washing, a sprayhead adjacent to the top of the supportfor spraying water radially across the downturned surface of the plate,the support comprising a vertically extending tube which supports thesprayhead at the upper end of the tube, a hub assembly in which the tubemoves upwardly and downwardly with a telescoping movement and with theplate on said support, nozzles located at angularly spaced regionsaround the support and radially outward therefrom in position to directjets of water against the top surface of the plate when the plate andsupport are in a lowered position, passages through which water is supplied to the sprayhead and to the nozzles, and valve means includingports in the side walls of the hub assembly which are uncovered bydownward movement of the tube, the ports for supplying water to thesprayhead and to the nozzles being at different levels and positioned sothat water is supplied to the sprayhead before it is supplied to thenozzles during downward movement of the tube.

14. A dishwasher including a support on which a plate, glass, kettle orother article is placed preparatory to washing, the support having a topplatform of limited area on which the plate is balanced and held whilebeing ill washed, the support being movable up and down and havingresilient means for holding it in a raised position, rotary brushes forscrubbing the plate when the support is pushed downwardly far enough tobring the plate into contact with the brushes, said brushes including aninner brush shaped to contact with the inside of glasses and tumblers,and said brushes having upwardly extending bristles for scrubbing thedownturned surface of the plate, and having outer bristles which extendoutwardly and upwardly and which are of substantial length for fittinginto the corners of kettles placed on the support and pushed downwardlyover the brushes, and means for supplying Water to the downturned andinside surfaces of the articles on the support.

15. The dishwasher described in claim 14 characterized by rotary brusheswhich include an inner brush shaped to fit the inside of glasses andtumblers, and an outer brush having upwardly extending bristles and thenoutwardly and upwardly extending bristles, the brushes being of shortcircumferential extent and the inner brush being angularly ofiset fromthe outer brush by a substantial angle, and motor means connected withthe brushes for rotating them about a substantially vertical axis.

16. A dishwasher including a turntable, means for rotating theturntable, a support on which a dish is placed preparatory to washingand with the surface to be washed turned downward, the support beingmovable upwardly and downwardly with respect to the turntable, andhaving spring means for holding it in a raised position, rotary brushmeans with which the plate is brought into contact when the support ispushed downwardly below a predetermined level, the turntable having anon-circular hub, and a hub of the brush means having complementarynon-circular surface which fits into telescoping relation. with thenon-circular hub to provide a driving connectionbetween the brush meansand the turntable free of fastening means and from which the brush meanscan be freely lifted to remove them from the dishwasher.

17. The dishwasher described in claim 16 characterized by a turntablewhich is a sheet metal element having a downturned rim of one-piececonstruction therewith, and further characterized by a motor locatedunder the turntable and Within the circumferential limits thereof, adriving wheel in contact with the inside of the downturned rim forrotating the turntable, and motiontransmitting means including a speedreduced connecting the motor to the driving wheel that contacts with thedownturned rim of the turntable.

18. A dishwasher including a container having an open top, a supportextending upwardly adjacent the vertical axis of the container with atop surface having protuberances on which a plate is balanced and heldin position for washing, a sprayhead adjacent to the top of the support,the support being movable upwardly and downwardly, resilient meansurging the support'into a raised position, brush means in the container,a turntable in the container below the brush means, a driving connectionon the turntable and on which the brush means rest for transmittingrotation of the turntable to the brush means, the container having anouter wall at a substantial distance from the turntable and whichextends above the turntable, and the container having an inner wallbelow the turntable and of substantially less diameter than the outerwall to provide an annular channel between the walls for catching wastewater of the dishwasher, a soap solution chamber enclosed by the innerwall, a motor in a closed casing in the soap solution chamber, a hubassembly which includes a bearing on which the turntable turns, bearingmeans in the hub assembly in which the plate support is verticallymovable with a telescoping movement into the hub assembly,motiontransmitting connections between the motor and the turntable,valve means in the hub assembly in position to be operated by downwardmovement of the support 11 V to supply water to the sprayhead when thesupport is pushed downwardly in the hub assembly for a predetermineddistance, and a soap solution dispenser connected with the soap solutionchamber and controlled by downward movement of the support.

19. A dishwasher including a container open at its upper end, supportfor an article to be washed, the support being movable upwardly anddownwardly, rotary brush means with which the article to'be Washed comesinto Contact when the support is pushed downwardly, a turntable in thecontainer, the container having outer wall extending downwardly from theupper edge of the container to a level substantially below the level ofthe turntable, and an inner wall extending from below the turntable toenclose a chamber under the turntable and to form with the outer wall anannular channel for 12 waste water, and a downwardly extending rimaround the periphery of the turntable, said rim extending down- Wardlyatleast as far as the top of the inner Wall to shield, against splashingwater, the space located under the turntable and above the chamberenclosed by the inner wall.

References Cited in the file of this patent UNITED STATES PATENTSRobinson Apr. 23, 1895 576,066 Lippincott Jan. 12, 1897 1,662,205 ParryNlar. 13, 1928 2,253,539 Steinhilber Aug. 26, 1941 FOREIGN PATENTS64,6232 Switzerland of 1913

